Our suction tube is made of high medical grade of pvc,no allergy, light-blue transparency, easy to observe. SUCTION SERIES SUCTION CONNECTION TUBE (SURGICAL SUCTION TUBE, YANKAUER SUCTION TUBE) CAT NOSIZEPCS/CARTONGW*NWCS-14-011/4" 1.8m 504.7/3.9kgCS-14-021/4" 3.6m 50 5.0/4.0kg CS-14-03 3/16" 1.8m 50 4.7/3.9kg CS-14-043/16" 3.6m 50 5.0/4.0kg suction connection tube