The Fine Bubble EPDM tube diffuser ALo300T measures 2.5"*12"(300mm) and ALo600T measures 2.5"*24"(600mm). The Tubes are made on high grade EPDM / Silicone material, stainless steel 304 support dish and retaining clamp. The tubes feature open-end designed with one-piece injection molded PVC. ALo300T and ALo600T weight 0.45kg and 0.9kg respectively with 0 - + 120'C operation temperature range.