Non return valve hgl-1/8-b part no. 530030 make– festo/smc.,non return valve hgl-1/2-b part no. 530033.,non return valve hgl-1/4-b part no. 530031 make- festo/smc.,non return valve ha-1/4-qs-8 festo part no. 153454 make - festo or 100 equivalent,pneumatic cylinder model on esnu -16-40 -p-a part no. 14316 make festo/smc.