Plumbing - Hair Trap U Bend
https://smile.amazon.com/gp/product/B007PJG8O6/ref=oh_aui_detailpage_o00_s00?ie=UTF8&psc=1 $6.79
Belvedere HT1 Hair Trap Clear
Costs between $16 and $50 depending on where you buy. Cheapest place is...
https://businessplumbing.com/products-page/featured/belvedere-ht1-hair-trap-clear/
or from http://www.amazon.com/gp/product/B002SC9PTA/ref=pd_luc_sbs_01_01_t_lh?ie=UTF8&psc=1#
Another possibility is...
Catch-All Hair Trap for Salon Shampoo Bowls
http://www.amazon.com/Catch-All-Hair-Salon-Shampoo-Bowls/dp/B0043VZB0Q/ref=pd_cp_hi_2
I use with swivel connectors to connect with 1'5" ABS pipe.
http://www.zoro.com/i/G3080427/