Plastic rebar chairs and supports manufacture 1 SOG series, pod spacer, trench mesh support, wall panel chair 2 OEM/ ODM is OK Plastic ... 200kg available in the popular 50 & 65mm size. SOG Clip-on Chairs. A high load bar chair tested to exceed loads of ... 300kg, eliminating voids in the concrete, with the convenience of a side-clip mechanism, can also be used as trench mesh ...