![Er Ashish K Singh on Twitter: "The kilogram is the SI base unit of mass and is equal to the mass of the international prototype of the kilogram , a platinum-iridium standard Er Ashish K Singh on Twitter: "The kilogram is the SI base unit of mass and is equal to the mass of the international prototype of the kilogram , a platinum-iridium standard](https://pbs.twimg.com/media/DaqJWYlX0AE85Eh.jpg)
Er Ashish K Singh on Twitter: "The kilogram is the SI base unit of mass and is equal to the mass of the international prototype of the kilogram , a platinum-iridium standard
![The platinum and iridium alloy cylinder (pictured on November 16, Stock Photo, Picture And Rights Managed Image. Pic. CKP-P201811160652801 | agefotostock The platinum and iridium alloy cylinder (pictured on November 16, Stock Photo, Picture And Rights Managed Image. Pic. CKP-P201811160652801 | agefotostock](https://previews.agefotostock.com/previewimage/medibigoff/01b2d0fe31b9b0ba435c0d5a9cb516e3/ckp-p201811160652801.jpg)
The platinum and iridium alloy cylinder (pictured on November 16, Stock Photo, Picture And Rights Managed Image. Pic. CKP-P201811160652801 | agefotostock
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![The platinum and iridium alloy cylinder (pictured on November 16, Stock Photo, Picture And Rights Managed Image. Pic. CKP-P201811160670001 | agefotostock The platinum and iridium alloy cylinder (pictured on November 16, Stock Photo, Picture And Rights Managed Image. Pic. CKP-P201811160670001 | agefotostock](https://previews.agefotostock.com/previewimage/medibigoff/3aad661caf1e811da7a49fbc1a309f92/ckp-p201811160670001.jpg)
The platinum and iridium alloy cylinder (pictured on November 16, Stock Photo, Picture And Rights Managed Image. Pic. CKP-P201811160670001 | agefotostock
![Source Dia 0.025mm to 2mm Pt90Ir10 Pt80Pt20 PtIr30 platinum iridium wire/rod for glow plug/electrodes/medical on m.alibaba.com Source Dia 0.025mm to 2mm Pt90Ir10 Pt80Pt20 PtIr30 platinum iridium wire/rod for glow plug/electrodes/medical on m.alibaba.com](https://sc04.alicdn.com/kf/Hf347de7e96ff4ce680ff9d09de2d5616k/2842554/Hf347de7e96ff4ce680ff9d09de2d5616k.jpg)
Source Dia 0.025mm to 2mm Pt90Ir10 Pt80Pt20 PtIr30 platinum iridium wire/rod for glow plug/electrodes/medical on m.alibaba.com
![The platinum and iridium alloy cylinder (pictured on November 16, Stock Photo, Picture And Rights Managed Image. Pic. CKP-P201811160652401 | agefotostock The platinum and iridium alloy cylinder (pictured on November 16, Stock Photo, Picture And Rights Managed Image. Pic. CKP-P201811160652401 | agefotostock](https://previews.agefotostock.com/previewimage/medibigoff/7b01a6a60e2a0b5734db1d2db506779c/ckp-p201811160652401.jpg)
The platinum and iridium alloy cylinder (pictured on November 16, Stock Photo, Picture And Rights Managed Image. Pic. CKP-P201811160652401 | agefotostock
![Electrochemical and biological performance of hierarchical platinum-iridium electrodes structured by a femtosecond laser | Microsystems & Nanoengineering Electrochemical and biological performance of hierarchical platinum-iridium electrodes structured by a femtosecond laser | Microsystems & Nanoengineering](https://media.springernature.com/m685/springer-static/image/art%3A10.1038%2Fs41378-022-00433-8/MediaObjects/41378_2022_433_Figa_HTML.png)