Glass trap removes moisture while eliminating potential contamination from plastic. Graphite seal ensures purity and sealing at pressures up to 100 psi. Plastic outer tube provides protection in case of breakage. Adsorbent materials (100-g) are indicating DRIERITE® (Calcium sulfate with cobalt chloride) and 5-Å molecular sieve; a 40-µm stainless steel screen removes fine particulates. DRIERITE changes color from blue to pink when depleted—easily regenerated. Trap is 10-1/4"L x 1-3/8" dia. Shpg wt. 1 lb. (0.5 kg).