Pentek Traditional In-Line filters feature coconut shell, granular activated carbon, and are designed to reduce unwanted taste, odor and chlorine taste and odor. All Traditional In-Line filters include a durable, injection molded polypropylene body and cap, pre- and post-filter. They are pressure rated to 125 psi. Traditional In-Line filters are an ideal choice for post-RO, under-sink, ice-maker and food service applications. Model Maximum Dimensions Port Size Connection Type Chlorine Capacity @ Flow* GS-6RO-B 6" × 2" 1/4" FNTP >1,950 gal @ 0.5 GPM GS-6RO-G 6" × 2" 1/4" John Guest >1,950 gal @ 0.5 GPM GS-10RO-B 10" × 2" 1/4" FNTP >3,900 gal @ 0.5 GPM GS-10RO-C 10" × 2" 3/8" FNTP >3,900 gal @ 0.5 GPM GS-10RO-G 10" × 2" 1/4" John Guest >3,900 gal @ 0.5 GPM GS-10RO-H 10" × 2" 3/8" John Guest >3,900 gal @ 0.5 GPM GS-210RO-C 11" × 2-1/2" 3/8" FNTP >6,000 gal @ 1.0 GPM GS-215RO-B 14" × 2-1/2" 1/4" FNTP >8,950 gal @ 1.0 GPM * Based on manufacturer's internal testing.