Retaining clip to hold glass added to the bed of Wanhao i3 otherwise known as a Prusa i3. Printable without support and retained by M3.5 10mm nut and bolt. Glass 2mm from old picture frame cut to size. Take care with placement at front left of bed as this can cause problems if to close to corner. Added new longer clips for 3mm Toughened glass from Amazon after cracking 2mm http://www.amazon.co.uk/gp/product/B00QM4LUN4?psc=1&redirect=true&ref_=oh_aui_detailpage_o01_s00. One Clip per side holds well stuck bottom of a clip on back of bed to get around electrics.

I now use and recommend 19mm buldog clips on 3mm aliminium beds and supply of cheap 200mm mirror tiles as an easier way can change glass in seconds and have different coatings for different materials £13 for 8
http://www.amazon.co.uk/Mirror-Tiles-20-20cm-Qty/dp/B00ABEI688/ref=sr_1_1?s=kitchen&ie=UTF8&qid=1454495465&sr=1-1&keywords=mirror+tiles+20cm
See picture above no interferance with head.

Printed without support 0.2mm layers 20% fill